What is the weather like in San Juan vs Ulaanbaatar in September?

In September, San Juan averages 32°C high / 26°C low with about 147 mm of rain; Ulaanbaatar averages 17°C high / 2°C low with about 43 mm.

San Juan vs Ulaanbaatar in September

Ulaanbaatar is the better pick in September — 78 vs 61 on SeasonMap's comfort score. Ulaanbaatar is cool, a little rain, clean air, while San Juan is sweltering, rainy, clean air.

San Juan vs Ulaanbaatar — September climate, side by side

	🇵🇷 San Juan	🇲🇳 Ulaanbaatar
Comfort score	61/100 (C)	78/100 (B)
Feels-like high	38°C	14°C
Avg high / low	32° / 26°	17° / 2°
Rainfall	147 mm	43 mm
Rainy days	13	8
Humidity	83%	64%
Air quality (AQI)	29	36

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Month by month

San Juan vs Ulaanbaatar in September — FAQ

Is September better in San Juan or Ulaanbaatar?: Ulaanbaatar is the better pick in September — 78 vs 61 on SeasonMap's comfort score. Ulaanbaatar is cool, a little rain, clean air, while San Juan is sweltering, rainy, clean air.
What is the weather like in San Juan vs Ulaanbaatar in September?: In September, San Juan averages 32°C high / 26°C low with about 147 mm of rain; Ulaanbaatar averages 17°C high / 2°C low with about 43 mm.